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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >AN ANALYSIS OF THE ANTARCTIC HALOGEN OCCULTATION EXPERIMENT TRACE GAS OBSERVATIONS
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AN ANALYSIS OF THE ANTARCTIC HALOGEN OCCULTATION EXPERIMENT TRACE GAS OBSERVATIONS

机译：南极卤代烃实验痕量气体观测分析。

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摘要

Analysis of the version 16 Halogen Occultation Experiment (HALOE) CH4 data shows that this long-lived trace gas is well correlated with potential vorticity (PV) computed from National Meteorological Center balanced winds. Analyzing late September and October 1992 data, we show that very low CH4 values are confined to the interior of a vortex edge defined by the maximum gradient in PV. The CH4 and HF time tendency is used to estimate the descent rate in the Antarctic vortex. After removing a component of the trend correlated with the HALOE sampling pattern, we compute the lower stratosphere vertical descent rates and net heating rates in the spring Antarctic vortex. Our computations of the spring Antarctic vortex heating rates give -0.5 to -0.1 K/day. Over the winter season, the overall lower stratospheric descent rate averages about 1.8-1.5 km/month. These computations are in line with radiative transfer estimates of the heating and descent rate. The HALOE data thus appear to be consistent with the picture of an isolated lower stratospheric Antarctic vortex. [References: 26]
机译：对版本16卤素掩星实验（HALOE）CH4数据的分析表明，这种长寿命的痕量气体与根据国家气象中心平衡风计算出的潜在涡度（PV）密切相关。分析1992年9月下旬和10月下旬的数据，我们发现很低的CH4值局限于由PV的最大梯度定义的涡旋边缘内部。 CH4和HF时间趋势用于估计南极涡旋的下降速率。去除与HALOE采样模式相关的趋势的一部分后，我们计算了春季南极涡流中较低的平流层垂直下降率和净加热率。我们对南极春季涡流加热速率的计算得出-0.5至-0.1 K /天。在冬季，平流层总体较低的下降速度平均约为每月1.8-1.5公里。这些计算与加热和下降速率的辐射传递估计一致。因此，HALOE数据似乎与一个孤立的低平流层南极涡旋的图片一致。 [参考：26]

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